Joost created a script, which you can use to add some data to the Google Webmaster Central Link tool page.
With his code your reports in the Google Webmaster Central Link tool page will show:
- PageRank score
- The anchor text of a link
- Which links are nofollowed
- Are the links still live
- Which links are images
The script can be found here: http://www.joostdevalk.nl/code/greasemonkey/gwt-external-links/